DO NOT mail a copy of your return. Submitting multiple original returns will cause processing delays.

What about my refund?
You can check the status of your refund here: Where’s my refund?

Made an error, forgot something, or need to amend?
If you discover that you made an error or forgot to include income, withholding, or another credit on your original return, you must file Form IL-1040-X, Amended Individual Income Tax Return. Learn more about filing Form IL-1040-X on MyTax Illinois.

I received a Return Correction Notice (RCN). What should I do?
DO NOT file another Form IL-1040. Please respond to the RCN as directed.